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<title>Intelligent Scissors</title>
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<h2>Intelligent Scissors (IS)</h2>
Based on "Intelligent Scissors for Image Composition" by Eric Mortensen and William Barrett
<p>This tool uses creates a "Live-Wire" that attempts to lock onto boundaries 
within an image. The processes begins by supplying a seed node on an image by 
left clicking. Between this point and the cursor a live wire is formed. As the 
cursor moves the live wire is updated. Once the live wire snaps to a desired 
path, a second left click locks it in place and generates a new seed node. The 
segment can be finalized by double left clicking or clicking back on the first 
seed node. In case the live wire does not snap to the desired boundary, a click 
and drag will create a freehand segment. Also, during segmentation a right click 
and drag can be used to pan around the image. </p>
<h3>Settings Panel</h3>

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		<td><img height="388" src="img/intelligentScissorsSetup.JPG" width="350" /></td>
		<td class="auto-style1" valign="top"><h3>Feature Weights</h3>
		As defined in "Intelligent Scissors for Image Composition"<br />
		w_z = Laplacian of Gaussian (LOG) zero crossing feature weight<br />
		w_g = Gradient magnitude feature weight<br />
		w_d = Gradient direction feature weight<br />
		<br />
		<h3>Checkbox options</h3>
		"Work on base resolution" forces IS to operate on the highest 
		resolution images available. When unchecked IS operates on images used 
		displayed on the users monitor. When checked IS may need to fetch the 
		higher resolution images, and may function very slowly.<br />
		"Approximate inverse cosine" The gradient direction feature requires 
		an inverse cosine in its calculations. When checked, IS uses a fast 
		polynomial approximation rather than Java's very slow acos function.
		<br />
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